Organic electroluminescence display panel and fabrication method thereof

Abstract

Disclosed are an organic EL(electroluminescence) display panel and a fabrication method thereof. The auxiliary electrode is formed to alternate but be overlapped with the pattern of the first electrode with a predetermined area so as to increase the pixel area as much as the overlapped area. Therefore, the present invention improves an opening ratio of the organic EL device. And, the present invention requires no additional step of forming an insulating layer for increasing an opening ratio, thereby saving a product cost for the fabrication of the organic EL device as well as being advantageous in fabrication efficiency. The present invention includes a transparent substrate, a first electrode formed on the transparent substrate, an auxiliary electrode overlapped with the first electrode in part so as to be connected to the first electrode, an organic light-emitting layer formed on the first electrode at the pixel, and a second electrode formed on the organic light-emitting layer so as to cross with the first electrode.

1. In a double-scan-structured organic electroluminescence (EL) device having a plurality of pixels formed at intersections between electrodes crossing with each other, an organic EL display panel comprising:
 a transparent substrate;  
 at least two first electrodes formed on the transparent substrate, wherein some of said first electrodes are formed in odd numbered pixels and the rest of said first electrodes are formed in even numbered pixels;  
 a zigzag shape auxiliary electrode formed on said first electrodes, wherein said first electrodes in said odd numbered pixels crisscross with the rest of said first electrodes in said even numbered pixels;  
 an organic light-emitting layer formed on the first electrode at the pixel; and  
 a second electrode formed on the organic light-emitting layer so as to cross with the first electrode; and  
 a barrier rib isolating the second electrode.  
 
   
   
     2. The organic EL display panel of  claim 1 , wherein the first electrodes comprise ITO (Indium Tin Oxide). 
   
   
     3. The organic EL display panel of  claim 1 , wherein the auxiliary electrode comprises at least one of Cr, Mo, Al, Cu or an alloy of one or more thereof. 
   
   
     4. The organic EL display panel of  claim 1 , wherein the auxiliary electrode comprises at least two layers. 
   
   
     5. The organic El display panel of  claim 1 , wherein the auxiliary electrode has a line width of about 1 to about 100μm. 
   
   
     6. The organic EL display panel of  claim 1 , wherein the auxiliary electrode is about 0.01 to about 10μm thick. 
   
   
     7. The organic EL display panel of  claim 1 , wherein an insulating film is formed on the auxiliary electrode. 
   
   
     8. The organic EL display panel of  claim 7 , wherein said insulating film does not overlap a light emitting area of a first electrode. 
   
   
     9. An organic electroluminescence (EL) display panel, comprising:
 a substrate;  
 a first electrode on said substrate, wherein a connecting portion of said first electrode is configured in a zigzag pattern; and  
 a pair of auxiliary electrodes configured in a zigzag pattern on said substrate, wherein a first auxiliary electrode of said pair of auxiliary electrodes is in contact with said first electrode, and a second auxiliary electrode of said pair of auxiliary electrodes is not in contact with said first electrode.  
 
   
   
     10. The organic EL display panel of  claim 9 , wherein said pair of auxiliary electrodes are in contact with said substrate and an insulating layer. 
   
   
     11. The organic EL display panel of  claim 10 , wherein said insulating layer is continuously formed in contact with both of said pair of auxiliary electrodes. 
   
   
     12. The organic EL display panel of  claim 9 , wherein said first auxiliary electrode is configured in a zigzag pattern that is complementary to said connecting portion such that said first auxiliary electrode contacts said connecting portion at intersecting points. 
   
   
     13. A display panel comprising:
 a substrate;  
 a pair of auxiliary electrodes on said substrate;  
 barriers on said substrate formed in a longitudinal direction; and  
 first electrodes, which have a length greater than a width, adjacent to said pair of auxiliary electrodes, wherein said first electrodes comprise first length portions perpendicular to said barriers, wherein at least one of said first length portions does not line up in the direction perpendicular to said barriers with at least one other of said first length portions.  
 
   
   
     14. The display panel of  claim 13 , wherein each of said pair of auxiliary electrodes has a jog in its length parallel to said barriers. 
   
   
     15. The display panel of  claim 13 , wherein said pair of auxiliary electrodes comprise first portions, second portions and third portions, wherein said first and third portions are parallel to one another and said second portions are perpendicular to and between said first and third portions. 
   
   
     16. The display panel of  claim 15 , wherein said first and third portions are off set by said second portions. 
   
   
     17. The display panel of  claim 16 , wherein said second portions have a length greater than a width, wherein said length of said second portions is parallel to a length of said barriers. 
   
   
     18. The display panel of  claim 15 , wherein a height of said second portions is parallel to a height of said barriers. 
   
   
     19. The display panel of  claim 15 , wherein at least one portion of said auxiliary electrodes overlaps said first electrodes. 
   
   
     20. The display panel of  claim 15 , wherein said first and third portions do not line up linearly.